Rebel Wilson tells me she doesn't say much when she comes face to muscle with the actor formerly known as Marky Mark.

"It's kind of like I can't concentrate," the Aussie actress said at the premiere of her latest flick, What to Expect When You're Expecting (out today). "I keep just going, 'uh, uh, uh,' and being like really embarrassing whenever I'm around him."

And around him she was. "He's super nice," Wilson said, "Like he drove me back to my trailer the other day."

What a gentleman!

Wilson also cracked that she and What to Expect star Jennifer Lopez, 42, had an onset romance. "Me and Jennifer dated for two minutes," she deadpanned, adding, "Not many people know that—but it happened. I'm not pregnant from that experience."